Yeah, the stock tires are crap IMO. They balloon and the foam gets all bunched up in one spot. This happened on my GTP and the tires ended up ripping apart the fender area behind the rear set. It is a fun car to drive though, even on "only" 5s, and that's on a 1512 motor; I can't imagine the tire spin on a 1515 motor.
Finally got the beast out of the box and first impressions...weight loss...she got to lose some weight and I have to sure up the chassis. While I am waiting to get the cash to by a 12x24 sheet of 4.4mm CF, I took some 1/8 Cf and fashioned and front to center to rear brace. I also cut out the servo tray using the same CF. I mocked up the positions of the battery tray and motor mount. By the way the Tekno Motor mount is as sweet as they come. I don't inticipate any chassis flex. More to come....